module Alchemy
	module BaseHelper

		# An alias for truncate.
		# Left here for downwards compatibilty.
		def shorten(text, length)
			text.truncate(:length => length)
		end

		# Returns @current_language set in the action (e.g. Page.show)
		def current_language
			if @current_language.nil?
				warning('@current_language is not set')
				return nil
			else
				@current_language
			end
		end

		def parse_sitemap_name(page)
			if multi_language?
				pathname = "/#{session[:language_code]}/#{page.urlname}"
			else
				pathname = "/#{page.urlname}"
			end
			pathname
		end

		# Logs a message in the Rails logger (warn level) and optionally displays an error message to the user.
		def warning(message, text = nil)
			logger.warn %(\n
				++++ WARNING: #{message}! from: #{caller.first}\n
			)
			unless text.nil?
				warning = content_tag('p', :class => 'content_editor_error') do
					render_icon('warning') + text
				end
				return warning
			end
		end

		# Taken from tinymce_hammer plugin
		def append_class_name options, class_name #:nodoc:
			key = options.has_key?('class') ? 'class' : :class 
			unless options[key].to_s =~ /(^|\s+)#{class_name}(\s+|$)/
				options[key] = "#{options[key]} #{class_name}".strip
			end
			options
		end

		# Returns an icon
		def render_icon(icon_class)
			content_tag('span', '', :class => "icon #{icon_class}")
		end

		# Returns an array of all pages in the same branch from current.
		# I.e. used to find the active page in navigation.
		def breadcrumb(current)
			return [] if current.nil?
			result = Array.new
			result << current
			while current = current.parent
				result << current
			end
			return result.reverse
		end

		# Returns a hash with urlname for each url level.
		# I.e.: +{:level1 => 'company', :level2 => 'history'}+
		def params_for_nested_url(page = nil)
			page ||= @page
			raise ArgumentError if page.nil?
			nested_urL_params = {}
			page_bread_crumb = breadcrumb(page)
			urlnames = page_bread_crumb[2..page_bread_crumb.length-2].collect(&:urlname)
			urlnames.each_with_index do |urlname, i|
				nested_urL_params["level#{i+1}"] = urlname
			end
			nested_urL_params.symbolize_keys
		end

		# Returns the Alchemy configuration.
		# 
		# *DO NOT REMOVE THIS HERE.*
		# 
		# We need this, if an external engine or app includes this module into actionview.
		# 
		def configuration(name)
			Alchemy::Config.get(name)
		end

		# Returns true if Alchemy is in multi language mode
		# 
		# *DO NOT REMOVE THIS HERE.*
		# 
		# We need this, if an external engine or app includes this module into actionview.
		# 
		def multi_language?
			Alchemy::Language.published.count > 1
		end

	end
end